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Abstract
The present study was conducted to identify the cholesterol-raising factor in coffee oil besides the other two well-known diterpenes, cafestol and kahweol. Female rats fed coffee oil for 4 weeks showed significantly higher level of plasma cholesterol (P< 0.01) and triacylglycerols (P < 0.01). Feeding unsaponifiable lipids of coffee oil caused significant decrease in plasma cholesterol; however, increase in triacylglycerol was observed. Rats given beta-sitosterol showed increase in plasma triacylglecerol and decrease in cholesterol levels, an effect similar to that observed with unsaponifiable lipids. beta-sitosterol is the major constituent of unsaponifiable lipids of the coffee oil. These results show that cafestol and kahweol diterpene alcohols are not the only cholesterol-raising factors in coffee oil.